Web supply mechanism for printing presses



March 25, 1941. H. M. BARBER WEB SUPPLY MECHANISM FOR PRINTING PRESSESQINVENTOR W %,M

Fil lgi Feb. 21, 1939 ATTORNEYS Patented Mar. 25, 1941 PATENT OFFICE WEBSUPPLY MECHANISM FOR PRINTING PRESSES Howard M. Barber, Pawcatuck,Conn., assignor to C. B. Cottrell & Sons Company, Westerly, R. 1., acorporation of Delaware Application February 21, 1939, Serial No.257,583

20 Claims.

This invention relates to web supply mechanisms of the automatic rollreplenishing or flying paster type where the expiring roll web is pastedto the replenishing roll web Without stopping the operation of thepress.

The object of this invention, broadly, is to provide means whereby anautomatic web roll replenisher may be used in connection with a web fedprinting press of the flat sheet delivery type.

The object of my invention, more specifically, is to provide Web sheetcutter controlled electric means for synchronizing the operation of theweb roll replenisher with the operation of the sheet cutters whereby thecutters will cut off the sheet from the web at a point spaced from thefree or unpasted tail end of the expiring web.

In flying pasters the pasted joint between the expiring web and thereplenishing web necessarily leaves a free or unpasted tail end as theexpiring web is severed from its roll. Where the operation of the webroll replenisher is not synchronized with respect to the sheet cuttersof the press the sheet cutters often cut the sheet from the web at thefree or unpasted tail end beyond the pasted joint, thereby leaving aloose piece of paper which tends to choke the cutters and interfere withthe piling of the sheets. It is to obviate this condition that thepresent invention is directed.

A practical embodiment of my invention is represented in theaccompanying drawing, in which Fig. 1 represents in detail sideelevation so much of a web fed printing press of the flat sheet deliverytype as will illustrate the application of my invention thereto;

Fig. 2 represents a diagrammatic view of the means for synchronizing theoperation of the flying paster of the web roll replenishing mechanismwith the sheet cutters of the printing press;

Fig. 3 represents a detail view showing the pasted joint between theexpiring roll web and the replenishing roll web after the expiring webhas been severed from its roll.

The expiring web roll is denoted by W and the replenishing web roll byW. The coacting rotary cutters of the web fed flat sheet deliveryprinting press are denoted by I, 2, and their knives by 3, 4. Thecoacting rollers 5, 6 serve to direct the web between the sheetcollecting rotary carrier land its pressure roll 8. This sheetcollecting rotary carrier 1 is herein shown as being provided with threesets of equally spaced grippers 9.

The sheet transfer rotary carrier I is herein shown as provided with twosets of equally spaced sets of grippers II which coact with every secondset of grippers 9 on the sheet collecting rotary carrier 1 to take acollected group of sheets therefrom.

The horizontally disposed flat sheet travelin endless delivery carrierI2 is shown as provided 4 with a plurality of equally spaced grippers l3arranged to take the collected groups of sheets from successive grippersll of the sheet transfer rotary carrier ID.

A sheet tail end engaging mechanism H of any well known or approved formis shown for taking the groups of sheets from the grippers I3 of theendless delivery carrier l2 and depositing them flat on the delivery.pile ii.

The web roll replenishing mechanism may'be of any well known or approvedform, that shown herein comprising a rotatable frame suitable forsupporting three web rolls and for bringing them successively into theirpasting and replenishing position. It is to be understood that the pastemay be applied in the usual manner to the surface of the replenishingweb roll W, and that the roll may be'rotated in the usual manner, notshown herein, for bringing the roll up to the desired speed and. forbringing the paste applied portion around into position to be pasted tothe expiring web W as the web is severed from its roll.

The, ,paster' comprises the pressure applying brush l6 carried by thespring pressed lever H which normally holds the brush in its retractedposition to permit the web W to freely pass to the press spaced from theperiphery of the replenishing roll which carries the web W.

The web severing knife I8 is carried by the spring pressed lever H whichnormally holds the knife out of its operative position.

The means which I have shown for synchronizing the operation of the webreplenishing mechanism with respect to the operation of the coactingrotary cutters I, 2 of the press may be electrically operated, andcomprises the following elements: A rotary cam may be mounted on anyshaft running in a predetermined relation to the cutters I, 2; or it maybe mounted on one of the shafts of the rotary cutters, so as to rotateone revolution for each revolution of the cutters. In the presentinstance the cam 20 is fast on the shaft 2| of the rotary cutter 2. Thecam controlled switch 22 is operated by one arm of a spring pressed rocklever 23, the other L arm of which lever carries a stud or roller 24which rides on the face of the cam 20, which cam has an extended lowsurface 25 for opening the switch 22 when the stud or roller 24 travelsalong said low portion. This switch 22 is 10- cated in the main circuitA, A. A hand switch 26 is also provided in the main circuit A, A.

Three cams, 21, 28, 29, are mounted as a unit in a position where theiraxis will be coaxial with the shaft 30 of the replenishing web roll whenthe roll is brought to its replenishing position. Well known or approvedmeans, not shown herein, are provided for locking the cams 21, 28, 29 toand releasing them from the said shaft. It will be understood that whenthe cams are locked to .the replenishing web roll shaft for the pastingoperation the cams must all bear a fixed relationship to the key 3I ofsaid replenishing web roll shaft and that the cams will then rotatetogether with the shaft and roll carried thereby. When the cams areunlocked from the shaft they will be silenced and will remaininoperative until used with the next succeeding replenishing web roll.The cam 21 controls the action of the switch 32 operated by one arm ofthe spring pressed lever 33, the other arm of which lever carries a studor roller 34 which rides on the surface of the cam 21 and is operated toclose the switch in the circuit A by a protuberance 35 on the face ofsaid cam 21.

The switch 35 is operated by one arm of a spring pressed rock lever 31,theother arm of which lever carries a stud or roller 38 which rides onthe face of the cam 28.

The switch 39 is operated by one arm of a spring pressed rock lever 40;the other arm of said lever carries a stud or roller U which rides onthe face of the cam 29.

A switch 42 is Operated by one arm of the spring pressed rock lever I9which also carries the expiring web severing knife I8.

An electromagnet 43 controls the operation of the switch 42 and also theoperation of the web severing knife I8; and an electromagnet 44 controlsthe operation of the brush depressing lever An electromagnet 45 islocated on the relay 45 and an electromagnet 41 is located on the relay48.

It will be noted that the rock lever 23 which carries the control switch22 is pivoted on one arm of a rock lever 49 pivoted on the shaft 2I, theother arm of which lever is connected by a rod 50 to one arm of a rocklever 5|, the other arm of which is moved by a governor 52 driven fromthe press or delivery, as, by means of the bevel gears 53, 54 and shaft55. This arrangement will cause the switch to be advanced or retardedaround the control cam 20 to compensate for the time lag in the variousrelays and switches which is uniform at all speeds which compensate forvarying speeds of the press. In practice, the parts are so positionedthat the control switch 22 will operate at the correct time for thelowest running speed at which a paste will be made and, as the speed ofthe press increases, the governor will-act to move the switch leveragainst the rotation of the cam shaft; thereby making the operation ofthe switch enough earlier to bring the pasted joint in correctrelationship with respect to the cut. This means will thus automaticallyregulate the time for starting the pasting operation.

When it is desired to paste the tail end of the web of the expiring rollW to the advance end of the web from the replenishing roll W, thereplenishing web roll will'be moved to bring its shaft 30 into alignmentwith the fixed axis of the cams 21, 28, 29. These cams are then lookedto the replenishing roll W in a predetermined relationship to the key 3|of the shaft 30, by well known or approved means, not shown herein ashereinbefore pointed out. The rotation of the replenishing roll W tobring its paste carrying surface into position to be engaged by the webof the expiring roll W by the pressure applying brush I8 will, at thesame time, rotate the cams 21, 28, 2-9 coincidently therewith. In themeantime, the hand switch 26 has been closed.

When the replenishing web roll W and the sheet cutters I, 2 have arrivedat positions which will ensure the pasting together of the webs at apoint which will cause the cutters to miss the free or unpasted tail endof the expiring roll web, the electric circuit A, A will be closedmechanically at the switch 22 by the action of the cutter controlled cam28, and also closed mechanically at the switch 32 by the action of theroll controlled cam 21. This closed circuit A, A will energize themagnet 45 of the relay 48 which in turn will close the circuits B, B.The circuit 3 is the maintaining circuit for the relay 48 and it willthus keep the relay contacts closed until the circuit is opened at theswitch 42 by the energizetion of the magnet, 43 which controls theoperation of the expiring web severing knife I8.

The circuit B energizes the magnet 41 of the relay 48 when the circuitis completed by the switch 35 which is mechanically operated by thetiming cam 28. Theoperation of the relay 48 closes the circuit C, whichis its own maintaining circuit, and also closes the circuit C whichenergizes the magnet 44 which controls the operation of the brush I5 topush the expiring web against the paste applied surface of thereplenishing web at the proper time with respect to press sheet cuttersI, 2, to paste the two webs together.

The cam 29 then operates to mechanically close the switch 39 whichenergizes the magnet 43 to swing the lever I9 for causing the knife I8to sever the expiring web and at the same time open the switch 42 andthereby the circuit B to open the relay 46. This breaks the circuit Bwhich is in series with the maintaining circuit C for the relay 48. Therelay 48 operates to open the circuit C, thus deenergizing the magnets44 and 43 and thereby allowing the brush I6 and the severing knife I8 toreturn under spring pressure to their non-operating positions. Thiscompletes the cycle of operations.

The cams 21, 28, 29 may then be silenced by unlocking them from thereplenishing roll by any well known or approved means, not shown herein.

As a condition precedent to the operation of the synchronizing mechanismit must be borne in mind that the circumference of the replenishing rollW must bear a differential or odd relationship to the length of thesheets out off by the sheet cutters I, 2. If the circumference of thereplenishing roll was equal to an exact number of cut-offs by thecutters I, 2, and the paste happened to be applied to the replenishingroll in such a position that the cutters would cut through the free orunpasted tail end of the expiring roll, this relationship would neverchange and the cams 20 and 21 would prevent any part of the pastermechanism from operating.

It. will be understood that the sequence of operations starts with themovement of the pressure applying brush I5 to force the expiring webagainst the replenishing web at its paste applied portion to form thepasted joint, and that this movement of the brush cannot take placeuntil the cutter controlled cam 20 arrives in the proper relationship tothe free or unpastedtail end of the expiring web, so that the cutterswill not cut through the same. This should be accom- 5 plished in thefewest possible rotations of the replenishing roll.

It will also be understood that when once the parts are adjusted nothingwill have to be readjusted so long as the replenishing rolls are ofapproximately the same circumference when brought into theirreplenishing position.

It is evident that various changes may be resorted to in theconstruction, form and arrangement of the several parts withoutdeparting from the spirit and scope of-my invention, and hence I do notintend to be limited to the particular embodiment herein shown anddescribed, but what I claim is:

1. Sheet cutters for a traveling web, means for joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond the joint, leaving a free tail end; and synchronizing means forpreventing the cutters from severing the said free tail end.

2. Sheet cutters for a traveling web, means for joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond the joint, leaving, a free tail end; and

sheet cutter controlled synchronizing means for preventing the cuttersfrom severing the said free tail end.

- 3. Sheet cutters for a traveling web, means for joining webreplenishing and expiring rolls on the run, means for severing theexpiring web beyond the joint, leaving a free tail end; and electricsynchronizing means for preventing the cutters from severing the saidfree tail end, said synchronizing means including a cam 0perated switchin the circuit of the electric synchronizing means and timed with thecutters.

4. Sheet cutters for a traveling web, means for joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond the joint, leaving a free tail end; and

electric synchronizing means for preventing the cutters from'severingthe said free tail end, said synchronizing means including a cam timedwith the cutters and a control switch in the circuit of the electricsynchronizing means and operated by said cam.

5. Sheet cutters for a traveling web, meansfor joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond the joint, leaving a free tail end; and electric synchronizingmeans for preventing the cutters from severing the said free tail end,said synchronizing means including a cam timed with the cutters, acontrol switch in the circuit of the electric synchronizing means andoperated by said cam and means for automatically changing the positionof the switch with respect to its operating cam.

6. Sheet cutters for a traveling web, means for s5 joining webreplenishing and expiring rolls on the run, means for severing theexpiring web beyond the joint, leaving a free tail end; and electricsynchronizing means for preventing the cutters from-severing the saidfree tail end, said 7 synchronizing means including a cam timed with thecutters, a control switch in the circuit of the electric synchronizingmeans and operated by said cam and a web speed controlled governor forautomatically changing the position of the 75 switch with respect to itsoperating-cam.

7. Sheet cutters fora traveling web, means for joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond. the joint, leaving a treetail end; and electric synchronizingmeans for preventing the cut- 5 ters from severing the said free tailend, said synchronizing means including a cam operated switch in thecircuit of the electric synchronizing means and timed with the cuttersand cams operated by the replenishing roll. '10- 8. Sheet cutters for atraveling web, means for joining web replenishing and expiring rolls onthe run, means for severing the expiring web beyond the joint, leaving afree tail end; and electric synchronizing means for preventing the 15cutters from severing the said free tail end, said synchronizing meansincluding a cam timed with the cutters, a control switch in the circuitof the electric synchronizing means and operated by the cam and camsoperated by the replenishing 20 roll.

9. Sheet cutters for a traveling web, means for joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond the joint, leaving a. free tail end; and 25 electricsynchronizing means for preventing the cutters from severing the saidfree tail end, said synchronizing means including a cam timed with thecutters, a cam operated switch in the circuit of the electricsynchronizing means, means for 30 automatically changing the position ofthe switch with respect to its operating cam and cams operated by thereplenishing roll.

10.-Sheet cutters for a traveling web, means for joining webreplenishing and expiring rolls 35 on the run, means for severing theexpiring web beyondthe joint, leaving a free tail end;' and electricsynchronizing means for preventing the cutters from severing the saidfree tail end, said synchronizing means including a cam timed with thecutters, a cam operated switch in the circuit of the electricsynchronizing means, a web speed controlled governor for automaticallychanging the position of the switch with respect to its operating camand cams operated 45 by the replenishing roll.

11. Sheet cutters for a traveling web, means for joining webreplenishing and expiring rolls on the run, means for severing theexpiring web beyond the joint, leaving a free tail end; and 50 electricsynchronizing means for preventing the cutters from evering the saidfree tail end, said synchronizing means including a cam timed with thecutters, a control-switch in the circuit of the electric synchronizingmeahs and operated by 55 the cam, cams operated by the replenishing rolland magnets for controlling the operation of the web joining and websevering means.

12. Sheet cutters for a traveling web, means for joining webreplenishing and expiring rolls on 0 the run, means for severing theexpiring web beyond the joint, leaving a free tail end; and electricsynchronizing means for preventing the cutters from severing the saidfree tail end, said synchronizing means including a cam timed with thecutters, a control switch in the circuit of the electric synchronizingmeansv and operated by the cam, a web speed controlled governor forautomatically changing the position of the switch with respect to thecam, cams operated by the 7 replenishing roll and magnets forcontrolling the operation of the web joining and web severing means.

13. Sheetcutters for a traveling web, means for joining web replenishingand expiring rolls on the run, means for severing the expiring webbeyond the joint, leaving a tree tail end; and electric synchronizingmeans for preventing the cutters from severing the said free tail end,said synchronizing means including a cam timed with the cutters, acontrol switch in the circuit of the electric synchronizing means andoperated by said cam, cams operated by the replenishing roll, magnetsfor operating the web Joining and severing means and switches operatedby the last named cams for controlling the operation of said magnets.

14. Sheet cutters for a traveling web, means for joining webreplenishing and expiring rolls on the run, means for severing theexpiring web beyond the joint, leaving a free tail end; and electricsynchronizing means for preventing the cutters from severing the saidfree tail end, said synchronizing means including a cam timed with thecutters, a control switch in the circuit of the electric synchronizingmeans and operated by said cam, a web speed controlled governor forautomatically changing the position of the switch with respect to thecam, cams operated by the replenishing roll, magnets for operating theweb joining and severing means and switches operated by the last namedcams for controlling the operation of said magnets.

15. A flat sheet delivery web fed printing press 3 including sheetcutters for the traveling web;

-including sheet cutters for the traveling web;

0 a flying paster for joining web replenishing and expiring rolls, anexpiring roll web severing device which leaves a free tail end beyondthe pasted joint; and web sheet cutter controlled means forsynchronizing the paster with respect to the cutters whereby the cutterswill be prevented from cutting through said iree tail end. 17. Sheetcutters tor a traveling web, a flying paster for joining webreplenishing and expiring rolls, a knife for severing the expiring rollweb beyond the pasted joint, leaving a free tail end; and means forsynchronizing the relative positions of the paster and severed portionsof the web with respect to the cutters to prevent the cutters fromcutting through said free tail end.

18. Sheet cutters for a traveling web, a flying paster for joining webreplenishing and expiring rolls, a knife for severing the expiring rollweb beyond the pasted joint, leaving a free tail end; and web sheetcutter controlled means for synchronizing the relative positions of thepaster and severed portions of the web with respect to the cutters toprevent the .cutters from cutting through said tree tail end.

19. Sheet cutters tor a traveling web, a flying paster for joining a webreplenishing roll having acircumference bearing a diflerentialrelationship to the cut-oil's by the cutters to an expiring web roll,means for severing the expiring roll web beyond the pasted joint,leaving a free tail end; and means for synchronizing the relativepositions of the paster and web severing means with respect to thecutters to prevent the cutters from cutting through said free tail end.

20. Sheet cutters for a traveling web, a flying paster for joining a webreplenishing roll having a circumference bearing a diiferentialrelationship to the cut-ofls by the cutters to an expir- 'ing web roll,means for severing the expiring roll web beyond the pasted joint,leaving a free tail end: and web sheet cutter controlled means forsynchronizing the relative positions of the paster and web severingmeans with respect to the cutters to prevent the cutters from cuttingthrough said free tail end.

HOWARD M. BARBER.

